Dental elevator



May 26, 1931. A. BARONE 1,806,592

DENTAL ELEVATOR Filed y 12, 192s ziasn 29 ll 60 10 1% van 601'.-

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Patented May 26, 1931 UNITED STATES.

ANTHONY BARONE, OF BOSTONQMASSACHUSETTS DENTAL ELEVATOR Application filed J'u ly 12,

This invention relates to an improvement in dental elevators. In extracting teeth, or wherefor any other reason special difliculty is anticipated it is common to employ ahand 5 toolhaving a blade somewhat like that of ascrew driver termed anelevaftor to loosen the root preparatory to extraction. Heretfore so far as I am aware the elevatorso employed-has been operated entirely by hand 10 manipulation to loosen or pry out the root orroots on teeth.

The object of the present invention 1s to rovide mechanism for actuating or vibratmg the tooth so that the hands of the oper- 15 ator may be left free to simply hold the elevator blade in proper position and shift 1t from one point to another accordmg to the particular point desired by the operator. I

Before explaining in detail the present 1n,-

29 vention, it is to be understood that the lnvention is not limited in its application to the details of construction and arrangement of partsillustrated in the accompanymg draw,-

, ings, since the inventlon is capable of other 25 embodiments and of being practised or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein isfor the purpose of description and not of limitation, and 1t 18 not intended to limit the invention beyond the terms of the several claims hereto appended'as considered in view ofthe' prior art and the requirementsthereof.

In the drawings: a

1 Fig. 1 is aside elevation of a tool embodying the invention attached to the handpiece of a dental engine."

Fig.2 is a similar view but partly 1n section.

Fig. 3 is a plan shown in Fig. 1. V V

Fig. 4 is a sectlon on l1ne 44 of Fig. 1.

Fig. 5 is a diagram partly 1n section showingthe elevator inserted between the root of a tooth and the root socket in the jaws pre paratory to operation.

Fig. 6 is a diagram partly 1n sectlon showing the root partially separated from the socket.v Referring to the drawings there 1s shown view of the apparatus as 1929. Serial No. 377,792.

at A a dental elevator having a blade 10provided with a shank or stem 11 and a cylin drical spindle 12 axial with the blade 10. The spindle 12 is provided with a crank arm 13 which may be integral with the spindle 12 or made as a separatemember attached to the spindle according to convenience in construction and assemblin The spindle 12 is pre erably formed with an extension 14 which serves as a pivot. 1

At B is shown a holder for the elevator having at one end'a socket portion 15 for the elevator and having at its other end a socket or tubular portion 16 offset from and parallel with thesocket portion 15 adapted for connection with a dental engine or other power mechanism and having an intermediate portion 17 which connects the two socket portions 15 and 16.

The socket portion 15 is formed with a cylindrical socket to form a bearing for the spindle 12 and the lower part of the said socket is stepped down to form a bearing for the pivot portion 14 of the spindle 12.

At 18 is shown a mandrel having a lower shank portion adapted to be engaged with the j aw of a dental engine or other driving mechanism and having an offset upper portion 19 which engages with an elongated slot20' in the crank arm 13 of the elevator. If the mandrel 18 is rotated on its) axis its angular or offset portion 19 will, by engaging with the slot in the end of the arm 13, cause the said arm to vibrate in the arc of a circle whose center is the axis of the spindle 12 and thereby vibrate the elevatorA on its axis.

Preferably there are provided ball'bearings 21 for the shaft 11 of the elevator.

A holder B is provided with a guide and bearing portions 22 for the mandrel 18. This bearing may be. a block or disc held fast in the tubular socket portion16 either by a tight fit or by other suitablemeans. 1 The body of the holder Bmay be a single casting or a'plurality of portions fastened together, As shownin the drawings, it consists of a single casting and is'formed with holes adapted to be closed by screw plugs 23, 24. This, however, is a matter of convenience and choice in construction as it is not essential that the holder be integral.

Any suitable mechanism may be provided for rotating the mandrel 18 on its axis. Preferably it is so constructed that it is adapted to be operatively connected with one of the usual dental engines and is shown in Figs. 1 and 2 as so connected.

At C is shown such an engine of wellknown construction. At is shown the rotary tubular spindle of the. engine having spring jaws 26 between which the non-circular shank 18 of the mandrel is inserted. The spring jaws 26 will grip the non-circular shank 18 of the mandrel so that when the spindle 25 of the engine is rotated it will cause the mandrel 18 to rotate and the outer end of the offset portion 19 will move in a circular path. By reason of the engagement of the crank arm 13 with the elongated slot 20, said crank arm will vibrate in the arc of a circle and cause the elevator blade 10 to vibrate on its axis. On account of the flattened form of the blade 10 the edges of the blade will vibrate in the arc of a circle and will exert a sort of prying action on the root 29 of the tooth thereby prying it from the fibers which bind the root to the jaw 30 and gradually work into the socket until the root is loosened as shown in Fig. 6. The tooth will then either fall out or can be easily pulled out with the fingers.

The form of the device shown in the drawings is especially used for extracting roots from the upper jaw but in some cases can well be used in extracting teeth from the lower jaw. For use on some teeth in the lower jaw the angle of the blade A to the intermediate portion 17 of the holder B may be greater or less than 90.

It should be made at such a point as will be most convenient for use according to the teeth on which it is to be used.

In using the device the elevator blade is inserted between the root and the wall of the socket and the engine is then turned on. The operative end of the blade will be vibrated and the root will be loosened in the socket or separated from the wall of the socket by breaking the holding fibers so that the tooth can be easily extracted.

What I claim:

1. In combination with a dental elevator blade for use in loosening roots of teeth from the root socket, said blade being provided with a spindle, a holder having a socket which forms a bearing for the said spindle, an arm connected with said spindle and means operatively connected with the said arm for vibrating the arm and thereby swinging the elevator blade on its axis.

2. In combination with a dental elevator having a spindle, a holder having a socket portion which forms a bearing to receive the spindle, a rotary driving member means for making a driving connection between said elevator spindle and said driving member and means whereby when said driving member is rotated the dental elevator will be caused to vibrate on its axis.

3. Mechanism for use with a dental elevator blade to loosen the roots of teeth in the root socket, said blade having a spindle shank, a holder having a socket portion which forms a bearing to receive the elevator spindle, a rotary driving member, means for making a driving connection between said elevator spindle and said driving member and means whereby when said driving member is rotated the dental elevator will be caused to vibrate on its axis.

4:. In combination with a dental elevator having a blade and a spindle shank, a holder having a socket within which the elevator spindle is journalled, an arm connected with said elevator spindle, means for operatively connecting said arm with a rotary driving member and means whereby the rotation of said driving member vibrates said arm and thereby vibrates said elevator on its axis.

. 5. In combination with a dental elevator having a blade and a spindle shank, a holder having a socket within which the elevator spindle is journalled, an arm comiected with said elevator spindle, means for operatively connecting said arm with a rotary shaft of a dental engine and means whereby the rotation of said shaft will vibrate said elevator.

6. In combination with a dental elevator having a blade, a holder having a bearing in which the elevator is journalled, an arm projecting from the said elevator and having an elongated slot, a mandrel journalled in said holder and having an offset portion, said offset portion engaging with the slot in said arm, means for making a driving connection between said mandrel and a dental engine whereby said mandrel is rotated and means whereby when said mandrel is rotated said elevator will be vibrated on its axis.

7. In combination with a dental elevator having a blade, a holder havin a bearing in which the elevator is journalled, an arm projecting from the said elevator and having an elongated slot, a mandrel journalled in said holder and having an offset portion, said ofifset portion engaging with the slot in said arm, and means for rotating said mandrel whereby said elevator arm is vibrated thereby vibrating the elevator.

8. In combination with a dental elevator blade for use in loosening roots of teeth from the root socket, said blade being provided with a spindle, a holder which forms a bearing for the said spindle, and means operatively connected with the said spindle for vibrating the elevator blade on its axis.

9. In combination with a dental elevator having a spindle, a holder having a bearing 

